If TRX goes back up to .00000640 (assuming BTC stays level), then I might sell my TRX, and wait for it to go into another slump, then buy some more at .00000035ish.

There are soooo many people buying TRX right now, that a lot of people will probably start selling a bunch later tonight, and make the value go down (at least that is how it has seemed to play out, in the past).

ETH is at a peak right now, so idk if it'll continue to climb, or go back down some, so u might wanna go with BTC, as it is in a slump, right now...if ur wanting to wait for a slump in TRX to buy in, then ETH might not be the best option (unless u already have some).